UG NX二次开发(C#)-建模-删除面

Posted 2021-10-29 GimiGimmy

前言

        在三维建模后，为了仿真的需要，需要对建好的模型进行简化处理，这时候同步建模的功能就非常有必要了。本文主要介绍一个删除面的操作，这样可以去掉孔面、倒圆角面、倒斜角面，以用于模型仿真的完整性。

一、创建一个UIStyler，用于测试需要

        采用UG NX的UIStyler创建一个测试界面，如下图所示。这样创建一个测试UI，以后所有的测试代码都可以快速添加和测试，如果里面的UI不符合要求，仅仅需要重新设计这个UI,并在代码中添加对应的内容即可，方便功能的调试。

 

二、创建这个测试工程

1.创建TestNX.TestNXSingleFunction测试工程

        在VS2019中，按照NXOpen C#模板创建工程，并将UIStyler保存时的TestNX.TestNXSingleFunction.cs文件添加到此工程中。

2.在cs中创建一个方法DeleteFace(Face []faces)

        创建DeleteFace，其中输入参数为Face []faces，允许一次删除多个面。

    public static void DeleteFace(Face[]faces)
    {      
        NXOpen.Features.Feature nullNXOpen_Features_Feature = null;
        NXOpen.Features.DeleteFaceBuilder deleteFaceBuilder1;
        deleteFaceBuilder1 = workPart.Features.CreateDeleteFaceBuilder(nullNXOpen_Features_Feature);

        NXOpen.Point3d origin1 = new NXOpen.Point3d(0.0, 0.0, 0.0);
        NXOpen.Vector3d normal1 = new NXOpen.Vector3d(0.0, 0.0, 1.0);
        NXOpen.Plane plane1;
        plane1 = workPart.Planes.CreatePlane(origin1, normal1, NXOpen.SmartObject.UpdateOption.WithinModeling);

        deleteFaceBuilder1.CapPlane = plane1;

        deleteFaceBuilder1.FaceEdgeBlendPreference = NXOpen.Features.DeleteFaceBuilder.FaceEdgeBlendPreferenceOptions.Cliff;

        NXOpen.Plane nullNXOpen_Plane = null;
        deleteFaceBuilder1.CapPlane = nullNXOpen_Plane;

        NXOpen.SelectionIntentRuleOptions selectionIntentRuleOptions1;
        selectionIntentRuleOptions1 = workPart.ScRuleFactory.CreateRuleOptions();

        selectionIntentRuleOptions1.SetSelectedFromInactive(false);

        NXOpen.FaceDumbRule faceDumbRule1;
        faceDumbRule1 = workPart.ScRuleFactory.CreateRuleFaceDumb(faces, selectionIntentRuleOptions1);

        selectionIntentRuleOptions1.Dispose();
        NXOpen.SelectionIntentRule[] rules1 = new NXOpen.SelectionIntentRule[1];
        rules1[0] = faceDumbRule1;
        deleteFaceBuilder1.FaceCollector.ReplaceRules(rules1, false);     
        deleteFaceBuilder1.Type = NXOpen.Features.DeleteFaceBuilder.SelectTypes.Face;

        NXOpen.NXObject nXObject1;
        nXObject1 = deleteFaceBuilder1.Commit();       
        deleteFaceBuilder1.Destroy();        
        plane1.DestroyPlane();
    }

 

3.在TestNX.TestNXSingleFunction.cs文件的UI Block中添加代码

        在TestNX.TestNXSingleFunction.cs中，找到public int update_cb( NXOpen.BlockStyler.UIBlock block)中的

         else if(block == face_select0)，添加下面的代码：

        

            else if(block == face_select0)
            {
                //---------Enter your code here-----------
                TaggedObject[] taggedObjects = face_select0.GetSelectedObjects();
                Face[] faces = new Face[0];
                foreach(var to in taggedObjects)
                {
                    Array.Resize(ref faces, faces.Length + 1);
                    faces[faces.Length - 1] = (Face)to;                   
                }
                DeleteFace(faces);
             }

4. 编译链接生成dll

        然后编译连接，生成TestNX.TestNXSingleFunction.dll

三、测试删除面功能

        测试效果如下：

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